I need an electrical diagram for lexus sc300 (year 2000) - Answered by a verified Lexus Mechanic I have a 92 Lexus SC300 and am looking control arms as the dealer says bushings are not available. Is there a relay for the power antenna in the fuse box under the hood of my 2000 lexus sc300 or in the fuse box by the drivers door.. The video above shows how to replace blown fuses in the interior fuse box of your 1995 Lexus LS400 in addition to the fuse panel diagram location. Electrical components such as your map light, radio, heated seats, high beams, power windows all have fuses and if they suddenly stop working, chances are you have a fuse that has blown out.. 92 Lexus SC300 stereo wiring - Wiring Diagram for 92 Lexus SC300, Looking to Install an Aftermarket deck.